by Ms.Mouse Ukes4Fun Songbook - pdf versions in a better format can be found here:
The songs have been grouped in books around the members who regularly lead the singing. There is no other deliberate theming and the contents are quite varied.
The songs are as we play and sing them - though they all bear at least a passing resemblance to the originals and should be recognisable. The level of difficulty also varies within each book. There are probably some mistakes as well.